US1141770A - Method of bluing steel or iron sheets. - Google Patents

Method of bluing steel or iron sheets. Download PDF

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Publication number
US1141770A
US1141770A US80983414A US1914809834A US1141770A US 1141770 A US1141770 A US 1141770A US 80983414 A US80983414 A US 80983414A US 1914809834 A US1914809834 A US 1914809834A US 1141770 A US1141770 A US 1141770A
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United States
Prior art keywords
sheets
box
sulfur
iron sheets
steel
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Expired - Lifetime
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US80983414A
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John E Carnahan
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Individual
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Priority to US80983414A priority Critical patent/US1141770A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied

Definitions

  • the invention relates to the oxidation of steel or iron sheets for the purpose of giting them a deep or dark blue finish.
  • Ordinary oxidation by steam, air or other oxidizing agent gives them a comparatively light blue finish. which for many purposes is not as desirable or acceptable for commercial purposes as a darker blue finish.
  • the object of the present invention is attained by oxidizing the surface of the sheets in an aunealiing box as by the usual steam process, and at the same time subjecting the sheets to the action of sulfur vapor or fumes, which results in giving them a deeper and darker blue than can be produced by the steam or other oxidizing agent alone.
  • the improved process ma ⁇ be performed by heating: the sheets in an annealing box to an annealing heat. and then cooling the sheets while incloscd in the box. to a dark red color.
  • steam or other oxidizing agent is introduced into the box in the usual manner for oxidhcing the sheets.
  • a small quantity of sulfur is introduced into the annealing box. as by placing; it in a small pan and insertin; the same under the rim of the annealin; box. by raising the box slightl: from its bed plate.
  • the sulfur thus introduced into the annealing box may be in powdered, granular, or other convenient form. and may be from several ounces to a pound in weight. according to the size of the box. the surface area of the. sheets therein. and the particular depth or darkness of the blue to be produced on the sheets.
  • the heat therein very promptly converts the sulfur into a vapor, and the fumes rising therefrom permeate the pack of sheets and produce in the surface thereof the desired deep or dark blue color.
  • the sulfur can be introduced into the box and Will be properly vaporized, at any time While the heat therein is from 1500 F. down to about 700 l., within which range the best results have been obtained; and it will be furthermore understood, that it is not essential to introduce at one time, all the sulfur which may be ultimately required, but the same is preferably introduced at intervals during the cooling of the sheets, and is effective as long as the heat therein properly aporizes the I sulfur.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Description

UNITED STAllIZ PATENT OFFICE.
JOHN E. CARNAHAN, OF CANTON, OHIO.
METHOD OF BLUING STEEL OR IRON SHEETS.
No Drawing.
T (117 whom it may concern Be it known that 1 JOHN E. CARNAHAN, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio. have invented a certain new and useful Method of Bluing Steel or Iron Sheets, of which the following is a. specification.
The invention relates to the oxidation of steel or iron sheets for the purpose of giting them a deep or dark blue finish. Ordinary oxidation by steam, air or other oxidizing agent gives them a comparatively light blue finish. which for many purposes is not as desirable or acceptable for commercial purposes as a darker blue finish.
The object of the present invention is attained by oxidizing the surface of the sheets in an aunealiing box as by the usual steam process, and at the same time subjecting the sheets to the action of sulfur vapor or fumes, which results in giving them a deeper and darker blue than can be produced by the steam or other oxidizing agent alone.
The improved process ma}: be performed by heating: the sheets in an annealing box to an annealing heat. and then cooling the sheets while incloscd in the box. to a dark red color. at \'-.'hich time steam or other oxidizing agent is introduced into the box in the usual manner for oxidhcing the sheets. and at the same time a small quantity of sulfur is introduced into the annealing box. as by placing; it in a small pan and insertin; the same under the rim of the annealin; box. by raising the box slightl: from its bed plate. The sulfur thus introduced into the annealing box may be in powdered, granular, or other convenient form. and may be from several ounces to a pound in weight. according to the size of the box. the surface area of the. sheets therein. and the particular depth or darkness of the blue to be produced on the sheets.
Specification of Letters Patent.
Patented June 1, 1915.
Application filed January 2, 1914. Serial No. 809,834.
Upon the introduction of the sulfur into the box, the heat therein very promptly converts the sulfur into a vapor, and the fumes rising therefrom permeate the pack of sheets and produce in the surface thereof the desired deep or dark blue color.
It will be understood that the sulfur can be introduced into the box and Will be properly vaporized, at any time While the heat therein is from 1500 F. down to about 700 l., within which range the best results have been obtained; and it will be furthermore understood, that it is not essential to introduce at one time, all the sulfur which may be ultimately required, but the same is preferably introduced at intervals during the cooling of the sheets, and is effective as long as the heat therein properly aporizes the I sulfur.
of hitting heated steel or consists in oxidizing the sheets by steam or other uXlkllilllfJ-tlfltllt. 80 I and at the same time subjecting: the sheets to the action of sulfur fumes at a temperature exceeding: 700 F.
JOHN E. (XXRXAHAN.
lVi tnesses:
EARL C. CARLsox, Lot'rsc M. Comm.
US80983414A 1914-01-02 1914-01-02 Method of bluing steel or iron sheets. Expired - Lifetime US1141770A (en)

Priority Applications (1)

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US80983414A US1141770A (en) 1914-01-02 1914-01-02 Method of bluing steel or iron sheets.

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US80983414A US1141770A (en) 1914-01-02 1914-01-02 Method of bluing steel or iron sheets.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674553A (en) * 1950-07-19 1954-04-06 Gillette Co Rustproofing
US4123291A (en) * 1976-12-23 1978-10-31 Armco Steel Corporation Method of treating steel strip and sheet surfaces, in sulfur-bearing atmosphere, for metallic coating
US4140552A (en) * 1976-12-23 1979-02-20 Armco Steel Corporation Method of treating aluminum-killed and low alloy steel strip and sheet surfaces, in sulfur-bearing atmosphere, for metallic coating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674553A (en) * 1950-07-19 1954-04-06 Gillette Co Rustproofing
US4123291A (en) * 1976-12-23 1978-10-31 Armco Steel Corporation Method of treating steel strip and sheet surfaces, in sulfur-bearing atmosphere, for metallic coating
US4140552A (en) * 1976-12-23 1979-02-20 Armco Steel Corporation Method of treating aluminum-killed and low alloy steel strip and sheet surfaces, in sulfur-bearing atmosphere, for metallic coating

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